Q1:

An economizer in steam generator performs the function of

Q2:

The higher calorific value of fuel occurs when water vapour

Q3:

In Rankine cycle heat is added

Q4:

Pressure reaches a value of absolute zero

Q5:

For a given range of extreme pressure the maximum efficiency of the Rankine cycle occurs for.

Q6:

Efficiency of simple Rankine cycle is_____ than the carnot cycle between the same temperature limits.

Q7:

Phase change (or) boiling of steam taken place in which part of the cycle.

Q8:

Which of the following statements regarding a Rankine cycle with reheating is True?

(i) Increase in a mean temperature of heat addition.

(ii) Increase in thermal efficiency

(ii) Final dryness fraction is increased

Q9:

Enthalpy at the entry and exit of turbine are 4000KJ/kg and 2000KJ/kg respectively. If the pump work is 4KJ/kg. Determine the specific steam consumption (kg/KWh) in Rankine cycle.

Q10:

Photoconductivity is a characteristic of semiconductor,when light falls on certain semiconductors, it

Q11:

Running speeds of steam turbine can be brought down to practical limits by which of the following method (s)?

1. By using heavy flywheel.

2. By using a quick response governor

3. By compounding

4. By reducing fuel feed to the furnace.

Q12:

Ratio of actual indicated work to hypothetical indicated work in a steam engine is the

Q13:

A gas turbine plant working on joule cycle produces 6000KW of power. If its work ratio is 60%. The power consumed by the compressor is

Q14:

The clearance flow between the blade tips and casting of a steam turbine is

Q15:

Match List-I (Various velocities in the velocity diagram of a two stage impulse turbine) with List-II (Blade angles) and select the correct answer using the codes given below the lists:

	List-I		List-II
A.	Relative velocity of steam at inlet tip of blade	1.	Nozzle angle
B.	Absolute velocity of steam at inlet tip of blade	2.	Moving blade leading edge angle
C.	Relative velocity of steam at outlet tip of blade	3.	Moving blade trailing edge angle
D.	Absolute velocity of steam at outlet tip of blade	4.	Fixed blade leading edge angle

 Codes:

Q16:

The degree of reaction of a turbine is defined as the ratio of

Q17:

Among other things, the poor part-load performance of De level turbine is due to the

Q18:

The correct sequence of the given steam turbines in the ascending order of efficiency at their design points is

Q19:

At a particular section of a reaction turbine, the diameter of the blade is 3.6m, the velocity of flow of steam is 98 m/s and the quality of steam flow 10.8m³/s. The blade height at this section will be

Q20:

Consider the following statements regarding the nozzle governing of steam turbine:

1. Working nozzles receive steam at full pressure.

2. High efficiency is maintained at all loads

3. Stage efficiency suffers due to partial admission.

4. In practice each nozzle of the first stage is governed individually.

Which of these statements are correct?

Q21:

A steam power plants has the boiler efficiency of 92%, turbine efficiency (mechanical) of 94%, generator efficiency of 95% and cycle efficiency of 44%. If 6% of the generated power is used to run the auxiliaries, the overall plants efficiency is

Q22:

Which amount the following is the boiler mounting?

Q23:

A Curtis stage, Rateau stage and a 50% reaction stage in a steam turbine are examples of

Q24:

The isentropic heat drop in the nozzle of an impulse steam turbine with a nozzle efficiency 0.8, blade velocity ratio 0.4 and mean blade velocity 200m/s in kJ/kg is

Q25:

The efficiency of superheat Rankine cycle is higher than that of simple Rankine cycle because